Machine for producing electrical coils.



C. R. UNDEEHILL.

MACHINE FOR- PRODUCING ELECTRICAL COILS.

APPUCATION HLED JAN-22, x914.

Patented Nov. 16, 1915.

5 SHEETSSHEET 1.

InvenYarf WW WM C. R. UNDERHlLL.

MACHINE FOR PRODUCING ELECTRICAL COILS.

APPLICATION FILED 1A N.22.1914.'

moflsgv Pmma NOV. is, 1915.

5 SHEETS-SHEET 2.

vC. R. UNDERHILL.

MACHINE FOR PRODUCING ELECTRICAL cons.

APPLICATION FILED JAN.22. 1914;

JF QWW OT:

5 SHEETS-SHEET 3.

Patented Nov. 16, 1915.

205 7 Fh71 1: if?

lQii/wekww 7% KW I 7 flwma C. R. 'UNDERHILL.

MACHINE FOR PRODUCING ELECTRICAL C OILS.

APPLICATION FILED JAN. 22, 1914-- Patented Nov. 16,1915

5 SHEETS-SHEET 4- UNDERH ILL.

MACHINE- FOR PRODUCING ELECTRICAL COLLS,

APPLICATION men 1Au. .22. 19x4.-

Patented Nov'. 16,1915

5 SHEETS-SHEET 5- trap @TATE% raa nnr oneron CHARLES R. UNDERHILL, OFHAVEN, CONNECTICUT, ASSIGNOR TO, THE WIRECQ, OF NEW HAVEN, CONNECTICUT,A CORPORATION.

MACHINE FOR PRODUCING ELEQ TRICAL COILS.

Specification of Letters Patent. Patgntefl N 1% 1915 Application filedJanuary 22, 1914. Serial No. 813,817.

To all whom it may concern Be it known that I, CHARLES R. UNDERr HILL, acitizen of the United States, residing at New Haven, in the county ofNew Haven and State of Connecticut, have invented a new and usefulImprovement in Machines for Producing Electrical Coils;

and I do hereby declare the following, when taken in connection with theaccompanying drawings and the characters of reference marked thereon, tobe a full, clear, and exact description of the same, and which saiddrawings constitute part of this application, and represent, in

Figure 1 a plan view of one form which a machine constructed inaccordance with my invention ma. Y as-mne. Fig. 2 a view'of the machinein vertical transverse section on the line a-Z) of Fig. 1, lookingtoward the inner or driving end of the machine in the direction of thearrow 0. Fig. 3 a view of the machine in vertical transverse section onthe irregular line cle of Fig. 1, looking in the same direction as inFig. 2. Fig. 4 a detached plan view on an enlarged scale of thetape-carriage with the tapeguide omitted, and designed in particular toshow the mechanism employed for feeding the carriage and fordctcrminingthe timing of the ngers. Fig. 5 a partial view in vertiez i transversesection on'the line a-Z) of Fig. 1, this view being enlarged to show thedetails of the tape-guides. the tape-gmnming mechanism. thetape-severing mechanism, the tape-feeding mechanism andthe mechanism forprogressing the overlapping of the tape. Fig. 6 a detached broken viewin side elevation of the cam-cylinder together with the means employedfor connecting it with, and disconnecting it from its driving gear. Fig.7 a broken view in end elevation of the parts shown in the precedingfigure. Fig. 8 a detached broken view partly in front elevation, andpartly in vertical longitudinal section, designed in particular to showthe tape-carriage and the means employed for progressively increasingits rate of traverse in either direction so as to produce a progres siveincrease in the overlapping of the tape. Fig. 9 a broken perspectiveview of the tape carriage and tape-guide, together-with thetape-severing and tape-feeding mechanisms. Fig. 10 a broken schematicview of one form of coil which may be produced on my improved machine,this view illustrating the progressive overlapping of the tape and the.formation of end-closures. Fig. 11 a View in elevation of an electriccoil provided with end-closures. Fig. 11 a greatly enlarged broken viewof one end of the coil a portion of which is broken away to show a dabof glue upon the inner face of the outer end of one of the sections ofpaper from which one of the end-closures of the coil is built up. Fig.12 a detached broken view in side elevation, with particular referenceto showing the mechanism for oscillating the rock-shaft 33 by which theglue-fingers 88 are carried. My invention relates to an improvement inmachines for producing that class of electric coils in \vhichthe layersof wire are insulated from each other by spirally-wound tapes whether orsively increased in their overlap' to proportion the insulation to theelectrical stress in the wire, and whether or not the coils are providedat their ends with solid end-closures produced by the spiral winding ofthe tapes. the object of the inventim being to provide an automatic orsemi-automatic machine for the rapid and accurate production ofelectric(oils of the character described.

lVith these ends in view. my invention consists in a machine havingcertain details layers of helically wound wire and tape.

whether or not the tape is wound with a pronot the tapes areprogresgressively increasing overlap, and whether or not the coils areprovided at their ends with solid, spirally-wound end-closures of tape.

In F 10 and 11 I have shown a coil typical of the product of my machine,and consisting of alternate helically wound layers 2 of wire, and tape 8flanked by spirally-wound end-closures 4, the coils of tape in theinsulating layers thereof being applied with a progressively increasingoverlap disposed with reference to offsetting the electrical stnessiwIncoils for certain classes ofwork this feature is desirable, but in othercoils not important.

, In Fig. 11 I have indicated the minute dabs of adhesive employed tofasten the ends.

" of the tapeT to-the coil in building upthe end-closures; buti use ofan adhesive for this purpose may be d spensed with. g I

' I may further preface my description'by saying that the left-hand endof the maehine, whereits a driving pulley for convenience I shall 20 islocated, as its inner end, and the right-hand end of the machine as itsouter end.

the attendant.- I may machine chosen for illustration might be modifiedin a great variety of ways by the Q substitution of difierent forms ofmechani- 'ries a depending-arm tail-stock 13 carrying a insulating it isnecessary that the in a step cal appliances, without altering itsgeneral mode of operation and its function. i

As herein shown, the winding-spindle 6'is threaded at its left hand end7 to adapt it to be mounted in a driving-spindle 8 journaled in a sleeve9 located at the ends of rock-arms 10 depending, from a rock-shaft 11the opposite or outer end of which cartail-spindle 14 provided witlrtheusual tail-end or center 15 which, as usual, supports the outer endofthe said winding-spindle 6.

The driving-spindle 8 carries ahand-wheel 16 and is'furnished at itsinner end with a pinion 171 meshing into a driving-gear 18 mounted onthe main driving-shaft '19 the extreme inner end of which is providedwith.

a 'driving pulley 20 receiving power from 25 provided at its upper endwith a handwheel 26 andhaving its lower end mounted 27 fastened to thebase or frame 28 of the machine; At its upper end the shaft 25 isjournaled in an arm-29 fastened to the machine-frame 28. .Near its lowerend the shaft 25 carries a ratchet-wheel 30 by which step-by-step rotarymovement is imparted to the shaft through a sprin pawl 31 carried byanarm 32 depending rom a rock-shaft 33 journaled at itsends in brackets34, 35, fastened to the base of'the ma conceivable that the mechanism,

speak of The front of the machine will then be'the side nearest theattendant, and the back of the machine the side opposite further addthat the the replacement 12 having an integral chine-frame 28. For thedescribed recession 7 of the winding-spindle 6 by the step-by-steprotation of the shaft 25, the rock-shaft 33 is furnished with an arm 36carrying the armature 37 of an electro-magnet 38 the circuit throughwhich is per1odically closed by mechanism controlled by thetape-traverse Under the step-by-step rotation of the shaft 25, thewindingspindle 6 is caused to recede at. afixed rate of recession fromthe level at which the tape 21 and wire 22 are fed.-

After thecompletion of a coil, the winding-spindle 6 is'restored to itsinitial level by manually reversing the shaft 25 by the hand-wheel 26 orin some other way, the

"pawl 31 being held out of engagement with the ratchet-wheel 30 'at thistime. The t'apej21 of paper or any other suitable and availableinsulating material, is coiled upon an ordinary tape-reel 39turning'up'on a Stud 40 ina bracket 41 fastened to the rear of thetape-carriage 42. The stud 40 is furnished with a removable thumb-nut 43for of the reel 39 as required. The tape-carriage 42 (Figs. 4, 5) hasdovetail connection with fixed guide-ribs 44 fastened to the frame ofthe machine and arranged parallel with the length thereof.

For the actuation of the'traverse of the tape-carriage 42 for feedingthe tape 21 helias' will bedes'cribed later on.

cally to the winding-spindle 6, the said car-' I riage 42 is furnishedwith a depending actuatlng-nut 45 receiving a longitudinally movable andfrictionally driven traverse-screw 46 mounted upon a traverse-shaft 47journaled' in parts of the machine-frame 28 (Fig. 4). The traverse-shaft47 is driven by a pinion 48 located upon it near its outer end andmeshed-into by a driving-gear 49 carried by the outer end of areversing-shaft 50 which in effect is an intermediate shaft and which isfurnished near its inner end with an ordinary reversing-clutch 51 theface teeth at the opposite ends of which are alternately engaged withface teeth upon the hubs 52 and 53 of oppositely driven re verslng-gears54, 55, loosely mounted upon the said, shaft 50 for the reverse rotationof which they provide to effect the traverse of the tape-carriage 42 inopposite direcinto, -and is driven by, the extreme outer end of thedriving-shaft 19 (Fig. 1), while the gear 55 is meshed .into andoppositely driven by an intermediate pinion 57 meshing into agear 58also fastenedto the driving-shaft 19. The operation of the clutch 51 forreversing the traverse of the tape-carriage 42 will be taken up later onin connection with thedescrip tion of the reversal of the traverse ofthe wire feed.

As the traverse of the tape-carriage 42 in opposite directions 'must bestopped at the tions The said gear .54 meshes directly I a gear 56carried by,

61- and 65. The collar 6-lis fastened by a pin 66 to the traverse-shaft47, while the collar 65 is adapted to have, restricted sliding movementupon the said shaft 47 so as to be operated bv a take-up spring 67interposed betwen the said collar and a collar 68 fastened to the shaft4:7 by a pin 69 and carrying driving-pins 70 entering the collar andcoupling it with the shaft '-l7 for r0-- tation therewith,but'permitting it to have slight longitudinal movement with respectthereto, as already described. The described sliding connection of thecollar (35 with the shaft 47 takes the place of an ordinary spline.

The stop-pins G1, G2, coact with longitudinally adjustable stops 71, 72,clamped against the lower face of the tape-carriage 4:2 by means ofclamping-screws 73, 74. As the tape-carriage 42 approaches either end ofits traverse, one or the other of its stops 71 or 72 engages with thestop-pin 61 or. 62, and so holds the traversdscrew 46 against rotationwith the traverseshaft 47, which,

however, will continue to rotate within'the said screw 46 against thefriction produced between the head'59 and the collar 64, and the head 60and the collar (35. The traversescrew 46 now held'against rotation inone direction, is still free to rotate with the traverse-shaft 47 in theopposite direction, so that when the rotation of the traverseshaft 47 isreversed by the reversing mechanism described. the traverse-screw 46will be reversed with it and start the return travel of thetape-carriage 42, whereby the stop and pin just engaged. will bedisengaged at the conclusion of the initial reverse rotation of thetraverse-screw 45 after which, the engagement between the said stop andpin being broken, the screw 46 will be free to continue its reverserotation with the shaft-42 until the screw is again stopped for thestoppage of the tape-carriage by the co action of the stop and stop-pinat the opposite end of the traverse, when the operation just describedwill be repeated.

In the machine chosen for illustration, I

have provided for furnishing the coils with end-closures built upstep-by-step by feeding the tape to the spindle in the fixed intervalsbetween the traverse movements of the tape-carriage 42 which must be atrest during the formation of the end-closures which call for winding thethan helically.

The continued revolution of the traverseshaft 4.7 after the taverse ofthe tape-carriage 4-2 has been stopped, causes a worm 75 (Fig. 1) uponthe extreme outer end of tape spirally rather I the said shaft 47, torotate a worm-wheel 7 6 upon a stud 78 fixed in a bracket 79 fastened tothe machine-frame 28. The worm-wheel 7 (3 is driven whenever the worm 75is rotated by the periodically rotated shaft 47 upon which the said worm75 is mounted. The hub 77 of the worm-wheel 76 carries -a disk 80carrying two arms 81, 81, ad

justably secured in place by clampingscrews 82 carrying pressure-screws83 and 84. which alternately press spring-contacts 85, 86, located uponopposite sides of a contact-stud 87, whereby the magnet SS beforementioned, is energized for the actuation of the rock-shaft 33 for thepurpose at this time of applying a minute dab of adhesive.

to the tape before severing it. By making the contact-carrying arms 81,81, adjustal'ile with respect to the disk 80. the time at which thecircuit through the magnet 88 is closed, may be predetermined so as toput the required number, of wraps upon the respective end-closuresduring each cycle of the operation of the device. It will thus be seenthat the amount of tape wound upon the end-closure at any one time willbe determined by the period elapsing between the'stopping of thetraverse screw 4-6 and the encrgization of the magnet 38.

At the instant the magnet 38 is energized in the manner described, theyielding gluefingers 88 (Figs. 2, 4 and 5) are being held in positionsof readiness for one or the other of them todab a modicum of adhesiveupon the tape by the 'co-action of one of the two prongs 89. 90, of alatch 91, with a catch 92 fastened to a sheet-metal crosspiece 93carrying the fingers 88 and uniting the ends of two rock-arms 9i. 94,mounted uponthe rock-shaft 33. The said latch 91 is moved endwise withrespect to the catch 92 by being mounted upon a longitudinally movablerod 95 the ends of which are journaled in parts of the machine-frame 28(Fig. 4).

' For the purpose of utilizing thetape-carriage 42 for actuating thelatch 91. the carriage is furnished with a pin 96 interposed between twostop-collars 97. 9S, adjustably mounted upon the rod 95 and alternatelyen-, gaged by the pin 96 near the ends of the traverse of the carriage42.

Normally the glue-fingers 88 are supported in positions of readiness toapply the adhesive by the coa ction of the prongs 89, 90, of the latch91 with the catch 92. In the timing of the machine one or the segmentalrack other of the two stop-collars 97 98, engages with the stop-pin 96shortly before the tapecarriage 42 reaches the end of its traverse,whereby the rod95 is moved in the direction required for bringing the..catch 92 into registration with a clearance-space 99 between the prongs89 and 90, whereby the glue-fingers 88 will be permitted to descend-by.a long quick with the peripheries of glue-wheels 100 of which onlyone is shown. These wheels are mounted upon a shaft 101 carrying a gear.

102 meshing into the pinion 57 which meshes into the gear 58 on thedriving-shaft 19. (Fig. 3.) The glue-wheels 100 revolve in an ordinaryglue-pan 103 set in a hot water pan 104' supported in a frame 105, allof ordinary construction, aS 'W6ll as the scrap ers 106 which remove theexcess of glue from the wheelslOO.

Just as soon as the glue-fingers 88 have been charged with the adhesive,they are swung up, into their normal positions by the action of a cam107 mounted on the driving shaft 19 and co-acting with a cam-roll 108mounted in the rear end of a lever 109 hung upon a stud 110 in themachine-frame 28, and having its forward end provided with a 111 meshinginto a corresponding rack'112 on the shaft 33. The cam 107 acts tolifted posltions.

quickly carry the rock-arms 94 the long sweep required to restore thefingers 88 to their normal positions. A helical spring 145 connected atits upper end with the forward end of the lever 109, and at its lowerend with the bracket 34, operates to hold the cam-roll 108 hard againstthe cam 107, and insures the depression of the gluefingers 88 when theyare liberated by the release of the catch 92 by the lateral movement ofthe latch 91. The spring 145 is always exerting an effort to depress theglue-fingers 88, the functionofthe latch 92 being to support them intheir normal or During the time required for the depression andelevation of the gluefingers 88, the movement of the tape-carriage 42has continued and carried with it the rod 95, whereby theclearance-space 99 through of the latch 91 has been moved out ofregistration with the catch 92 which engages with the lower face of oneor the other of the latch-prongs 89,90, according as the tapecarriage isat one end of its traverse or the other. the medium of the cam 107against the under face of the latch prong engaged, wherethe shaft 95-will be 'rocked onits axis sufiiciently to allow the catch 92 to ride,as it were, over the prong and then drop down into engagement with theupper face thereof, whereby the glue-fingers 88, now charged with glue,will be heldin positions of readiness tobe moved through the shortdistance I required for one or apply its modicum of apply its-charge ofmovement of the rockerarms 94 until they are brought into contact timingof the machine,

completed its reverse tape and severing the same,

The catch 92 will be lifted through.

the other of them to adhesive to the tape by the energization of themagnet 38, and the following movement of the rock-shaft 33 which liftsthe said glue-fingersthro'ugh the very short are required for one ofthem to adhesive. A flat or leafspring 113 (Figs. machine-frame 28engages-with the rear end of the latch 91 and rocks the rod 95 forward 4and 5) fastened to the so asto insure the return of the latch 91.

into its normal position after it has been lifted by the catch 92 'asdescribed. In the the catch will now support the rock-arms 94 and thegluefingers 88 in their normal or lifted positions,

until the tape-carriage 42' has very nearlytraverse, during which newlayers of tape and .wire have been added to the coil being formed. Thenpreparatory to again applying a dab of adhesive to the of the stops 97,98, is engaged by the pin 96, and the shaft 95 moved just enough toregister the clearance-space 99 with the catch 92 which permitsthefingers to descend and be touched with glue, immediately after whichthey are lifted by the cam 107 to their normal positions, after whichthey-are moved by the energization of the magnet 38 for one or the otherof them, as the case maybe, to apply its modicum of glue to the tape.

By employing a magnet for. the final movement of the glue-fingers 88, Iam enabledto time them with a far greater degree of accuracy than wouldbe practical by the use of a cam upon which I rely to move them throughthe greater portion of their travel. Bythe employment of the catch 92,the glue-fingers 88 are normally supported in their lifted positions;otherwise, the arms revolution of the driving-shaft 19, whereas byusingthe catch 92, the caxn'107 operates effectively only once for everytraverse of the tape-carriage 42. The tape having been one or the other,

" 94 would be raised by the cam 107 for every touched with an adhesive,is severed, as

shown, by a knife 114 Which may actually out the tape or puncture it, orotherwise weaken it so that it will part under its own tension. In usingthe term-knife, therefore, I do not limit myself to any specificinstrumen'tality in this place. The knife 114 is adjustably mounted bymeans of a clamping-screw115, in the split forward end of a curvedknife-carrying arm 116 loosely mounted upon the rock-shaft 117 betweentwo arched or bowed arms 118 at the forward end of atape-guide 119secured to the forward portion of the tape-carriage 42 and formed in itslower face with a guide-way 120 which receives the tape which is fedforward through this guide-way into position to be delivered to thewinding-spindle 6. The rock-shaft 117 is supported at its ends in partsof the machine-frame 28, and passes carry a horizontally arrangedpaper-delivery plate 121 which supports an anvil 122 with which theknife 114 co-acts, the,parts 121 and 122 co-acting with each other toeffect the final delivery of the tape, As shown, the arched arms 118 areformed integral with the tape-guide 119, and the plate 121 with theforward ends of the arms 118.

For the rocking of the knife-shaft 117, it

is provided with a rock-arm 123 to the upper end of which is connectedthe inner end of an operating-rod 124 the forward end of which rests inthe forked upper end of a rock-arm 125' fastened to the rock-shaft 33and therefore participating in the slight rocking movement impartedthereto by the energizationof the magnet 38 which thus performs thethreefold function of effecting the application of adhesive to the tapeand the severance thereof, and ,the step by step recession of thewinding-spindle 6 as already described. The rod 124 is connected to theforked arm 125 by means of an adjustable nut 126 anda locking-nut 127.

As shown, the gluing of the tapeprecedes the severing. of the tape, butthis arrangement might be reversed. The gluing and severance of the tapeare timed by the proper adjustment of the parts, and may be varied asdesired. In any case the tape will be touched with glue so that when itis severed, its glued portion will form its coil end.

. In case the endclosures are dispensed with,

' tapebegins just before, or, as the tape isthe severance and gluing ofthe tape in the manner described, will probably be retained. The gluedend or coil .of the tape will now be pressed down upon the next innercoil of the said end-closure by means of a pressure-roll 128 journaledin the outer end of a yielding arm 129 the inner end of which isfastened by a bolt 130 to the forwardend of.

the knife-carrying arm 116 as shown in Fig. 5. The pressure of the roll128 upon the being severed, and continues until the kniferetractingspring 131 begins to lift theknife 114. The forward end of the saidspring 131 is attached to a lug-132 upon the arm 116, while its rear endis connected to a post.133 rising from the rear end of. the tape-guide119. In case only one knife 114 is employed. to sever the tape at theopposite ends of the coil, it must participate in the travel of thetape-carriage 42, and therefore the knife-carrying arm 116 must be freeto slide upon the knife-shaft 117 which forms the center upon which thearm 116 turns. To provide for rocking the shaft 117, and also for thereciprocation of the knife 114, I emplov a knife-operating rod 134sliding freely through the inner end of the arm 116 and mounted at itsends in fixed arms 135 secured to the knife-shaft 117 and partaking ofthe rocking movement thereof. The

knife-retracting spring 131 in lifting the knife 114-into its retiredposition, as shown in Fig. 5, lifts the pressure-roll 128 sufficientlyabove the path of the wire'guide of the coil. pressure-roll 128 from thepaths of the wireguide rolls 136, it would not be necessary to lift theknife 114 so far away from the anvil 122 as is shown in Fig. 5. 1

The action of the spring 131 in lifting the knife 114 and'thepressure-roll 128.must be preceded by the demagnetization of the magnet38. This is provided for by furnishing the rock-shaft 33 with an arm 137(Fig.3) coacting with a pm 138 mounted in the upper end of a frictionplunger 139 supported in an upright sleeve 140 fastened to the base ofthe machine-frame 28. The plunger 139 carries a pin 141 located in thecircuit of the magnet 38 and normally in contact with a pm 142 alsolocated in the circuit of the .magnet 38 and adjustably mounted in a lugJust as the magnet 38 completes the rocking of the shaft 33, the arm 137engages with the pin 138 and depresses the plunger 139 and so breaks thecontact between the pins 141 and 142, whereby the magnet 38 cuts itselfBut for the clearance of the,

out of the circuit and permits the spring 131' to act to retract theknife 114 and the pressure-roll 128. An arm 144 mounted upon therock-shaft 33 and complementary to the arm 137 aforesaid, engages theunder face of the pin 138 and so raises the plunger 139 and brings thepin 141 into contact with the pin-142 as the rock-shaft is'turned to thelimit of its inward movement by the spring 145 which turns therock-shaft 33 to .the

.same extent on the inward-movement that it is turned on the outwardmovement by the cam 107. The arm 144, therefore, closes that portion ofthe circuit at the sleeve 140 preparatory'to the next successiveenergization of the magnet 38. Before the circuit is reclosed at thesleeve 140 as just described, the worm 75 has broken the circuit at thecontact stud 87 (Fig.1) in connection with the tape-shiftingfunction ofthe device.

Since, in the operation of the machine,

the tape 21 and the wire 22 start at one end of thecoil at the sametime, the tape, on account of being much wider than the diameter of thewire will make, so to speak, faster than the same and reach the limit ofits traverse long enough before the wire reaches the lim t of'itstraverse to have time to supplv a predetermined numberof coils" to theend-closure and be gummed and sev- 7 ered, and still have time to waitbefore the tened by 'a'screwl47 to wire reaches the end of its traverse.v

'Withreference nowmor particularly to the feeding of the wire 22, itpasses over wire-guide rolls 136 adjustably mounted in the ends of aswinging-plate 146 fasthe downwardly curved end of a wire-traverse arm148 fastened to alongitudinally movable-wire-traverse rod 149 mounted atits ends in parts of the machine-frame 28 and running length wisetherewith. The wire-traverse rod 149 is constantly reciprocated by meansof a wire-traverse operating-arm 150 formed at its forward end with asleeve 151 through and in which the which the rod 149 passes,

rod is fastened. At its rear end, the said threaded hub 152 whichreceives a con arm 150 is formed with an internally stantly drivenwire-traverse screw 153 ]O11I'- naled in parts of the machine-frame 28and provided at its extreme inner end with a gear wheel 154.driven by a.gear wheel 155 mounted on the reversing shaft 50 in the reversemovements of which, already described, the wire-traverse screw 153participates.

In order to prepare the-tape'for the re-,

. versal of the wire, the Wire-traverse operat- 1ng+arm 150 is furnishedwith a flexible contact-finger 156 fastened in place by a screw 157 andprovided upon its opposite faces with contact-buttons 158 (Fig. 1)which,

as the case may be, respectively make c0n tact'w-ith the contact-rods159, 160, just be-- fore the wire completes its traverse. Wll'en videsfor the adjustment of the contact-rod 160. The said adjustablecontact-rods 159 and 160 are locatedin the circuit of a mag net which,for convenience, and as suggestive of its function, I shall call thenamely,

feed controller cam 167, and thereversing- 3 169 shall be strictlylimited to a half revocoupling 1 magnet, since it couples and bringsinto/play in a cycle of closely rea series of three cams,

lated operati0nS5 166, the tapethe tape-shifting cam cam 168, all .nowto' be described; The said cams1166 and: 168 are in. effect cam-pathsIformed/ina cam-cylinder 169 loosely mountedupon the r 'everSing shaft50 and held against e'ndwise play thereonby means Ora; collar170'fastened thereto (Fig.1) and a hub'171 formed on the cam-cylinder169'at the left hand" end thereof, and bearing oppositely locatedoppositely located dwells 174, the said against the gear 54which, inturn, is prevented from movement onthe shaft 50 by a shoulder 172thereon. Y

The cam-cylinder 169 is extended at its right hand end to form the cam167 (Fig. 2), which is a double cam, and formed with two lifts 173,173,'and two cam 167 being separated from the cam-cylinder 169 by meansof an integral hub 175 as shown in Fig. 1.

I may here explain that the tape-shifting cam 166 and the reversing-cam168 are each constructed-t0 repeat their action in reverse.

by the reversal of and paper at each half revolution of order as madenecessary the traverse of the wire end of the coil at each thecam-cylinder 169. a

The cam-cylinder 169, and hence the three cams 166, 167 and 168, arecoupled with the shaft 50 for periodic operation thereby by the actionof the said coupling-magnet165 which is located at the back of themachine and mounted upon a bracket 176 secured to the machine-frame 28.The said couplingmagnet 165 acts upon an armature 177 (Fig. 6) carriedby the lower end of an operatinglever 178 swung in opposition to themagnet by a spring 179 and hung upon a stud 180 in a bracket 181 of themachine-frame-28'.

At its upper end the lever178-is formed with a throat-like groove 182receiving in succession, at every half-revolution of. the

cylinder 169, one or the, other of two laterally projectingoperating-pins guiding stems 186 encircled by springs 187 located in theinner ends of the said cham- 183 mountedin bolts 184 located in chambers185 enter-' bers Y185 and exerting a constant effort to move the boltsoutward into their projected positions in which their noses 188 engagewith the teethof an annular ratchet 189 upon the adjacent vface of thereversinggear '54: The said lever 178, is also formed at its upper endwith a cam-surface 190 the upper end ofwhich drops off abruptly into anotch 191 (Fig. 6) ,the-said cam-surface 190 and notch 191 co-actingsuccessively with radially projecting stop-pins 192 projecting from theperiphery of the cam-cylinder 169. Specifically the cam-surface 190operates to prepare the lever'178 to efiect the sudden and definiteretraction of the bolts-184 from engagement with the annularratchet';189 so that any-one actuation of the cam-cylinder other oftheadjustable contact-rods 159, 160, according to the direction in whichthe wire is traveling; I thus provide definite periods the contact ofthe button 158 of the spring-finger 156 with either one or the detent193 from the pin 192.

of rest for thecam-cylinder 169 between its closely defined periodichalf revolutions. In order that the cam-cylinder 169 may be definitelystopped upon its completion of a half revolution and not be carriedahead by its momentum, the lever 178 is furnished with a hook-likedetent 198 (Fig. 6) which not only limits the rotation of the cylinderto a half revolution, but looks it in that.

position. i

The two bolts 181 coact with the annular ratchet 189 in succession, asalready explained, and while it is immaterial if both bolts are engagedat the sametime with the ratchet 189 when thecam-cylinder 169 is beingrevolv'ed, it is necessary that both bolts be retracted at the same timeto provide the cam 169 with its period of rest. For insuring, therefore,the retraction of the bolt 184: not co-acting, at the moment, with thelever 178', I provide a fixed cam 191 (Fig. 7) located diametricallyopposite the upper end of the lever 178 and formed upon the upper end ofan arm 195 of the machine-frame 28.

'As shown, the cam 19 1 begins the retraction of the inactive boltbefore the active bolt is is at rest. Supposing the cam-cylinder 169 vto have made a half revolution from the position in which it is shown,the'positionof it would be precisely the same as in Figs. 6 and 7. itwill be seen by reference to these figures, that when thecoupling-magnet 165 is energized and the lever 178 operated against thetension of the spring 179, the nose 188 of the active bolt willbeengaged with the ratchet 189, which will be imme-.

diately followed by the starting of the cam- Qylinder 169 on a halfrevolution,.the action of the magnet 165 having also cleared the Beforethis the inactive bolt has been retracted by its pin 183 riding up thefixed cam 194 near the end of the preceding rotation of the cam-cylinder169. Now at the very beginning of another half revolution of thecamcylinder 169, the pin 183 will ride off the cam 194: and permit theinactive bolt to be rengagedby its spring 187 with the ratchet 189.Both-bolts will then be reengaged with the ratchet 189 until thecam-cylinder 169 has nearly finished its half revolution,

when the hitherto active bolt will be-gradually disengaged from theratchet 189'by the cam 194, and when the hitherto inactive bolt willenter the throat 182 of the lever 178 so as to be in readiness to besuddenly dis engaged from the ratchet 189 at the instant the halfrevolution of the cam is completed.

I may here explain that the circuit through the coupling-magnet 165 isbroken previous to the completion of the half revolution of thecam-cylinder 169, as will be explained later on.

lVith reference now to the tape-shifting function of the cam 166, itreceives a camroller 196 upon the rear end of a cam-shifting lever 197swinging on a stud 198 mounted in a part of the machine frame 28. Theforward end of the lever 197 has swiveled in it a forked block 199 (Fig.4) interposed between two collars 200 upon the extreme inner end of thetraverse shaft 47, which, by the action of the tape-shifting lever 197is thus bodily moved endwise, first in one direction and then in theopposite direction for a distance represented by the width of the tapebeing handled. This endwise or tape-shifting movement of the traverseshaft 47 is designed to provide for shifting the end of the tape fromits position of registration with the end-closure of the coil beingformed, to a position at the end of the coil proper, so that when thetape is fed 7 again, it will begin to wind upon the last coil of wireand in advance of the new coil of wire. The connection of thetape-carriage 42 with the shaft 17 so as to participate in the endwisemovement thereof has already been fully explained and heed not be againrehearsed.

lVhen the traverse shaft 47 is moved endwise by' the lever 197 asdescribed for shifting the tape, it at the same time opens the circuitthrough the magnet 39. In discharging this last function, the worm 75 atthe right hand end of the shaft 4:7 acts in effect as a rack inconjunction with the teeth'of the worm-wheel 76 to oscillate the same-so as to disengage one or the other of the pres sure-screws 83, 8%.from the contact-springs 86, whereby the magnet 38 is demagnetized. T hetape having been shifted from v the end-closure to the end of the coilproper, has now to be fed. For this purpose I employ two feed-rolls 201,202, (Fig. 5) located one above the other in front of the tape-carriage,as shown in Fig. 9, and directly under the arched integral arms 118extending forward from the tape-guide 119,

as shown in Fig. 9. At their inner ends the rolls 201 202, are gearedvtogether by gears 208, while the lower roll 202 has mounted moved towardeachother into contact for engaging and feeding the tape, and away fromeach other out of contact to permit the-tape to be freely drawn betweenthem (Fig. 9) ofgthe tape feed-roll 201 which is depressed inte contactwith the lower feed" roll 202 for-feeding the tape when the roller 211in the lever 212'rides overthelifts 173" I of the cam 167. The specificrelative lengths of the lifts 173 and dwells 174 of the cam 167will'be-regulated according to the requirements ofuthe positive feedingof the .tape at each traverse thereof, it being nece's f sary to coverthe distance by-thQ'POSltIVQ I feeding ofthe tape. from'th'e' point'ofseverance of the tape to the contactofthe tape. with the wire as itbegins towrap itself upon the developing coil. As soon as the .end ofthe tape has been caught by the ac tion of the cam 167, the spring 213acts to lift the tape-feeed roll 201 away from the lower feed-roll 202after which the tape is drawn between them by the revolution of thewinding-spindle 6. The cam 167, as has already been explained, is adouble cam and duplicates its action during each revolution so'as toprovidefor feeding the tape once for eachtraver'se of the tape. Asthefeedroll pressurecam 167 is functioning to feed the tape, thereversing cam 168 begins to function to reversethe traverse of the wireand tape,.-.though it must be said that the beginning of the reversetraverse of the tape takes place; when'thetape-shiftinginstrumentalities'shift the tape a distance represented by its width.from the end-closure to the adjacent end of the coil. The saidcam,

168 receivesabam-rolle'r 216 located upon thejlower end of an arm 217depending from a longitudinally movable reversing rod 218 journaled' atitsends in partsof the machine frame and carrying about midway of itslength another depending arm 219 forked over the reversing clutch 51(Fig. 1) ,for sliding thesan'ie longitudinally on the reuversingshaft 50to couple the same either with the gear 54 or the oppositely rotatinggear 55 As, the cam 167 is completing its function of feeding the tape,the reversing rod 149 is "shifting for reversing the wiretraverse, andthetapecarri'age' which has.

already been shifted, asdescribed, for alining the feeding end-of thetape with the end proper of the coil, begins its regular reversetraverse.

-- I have already explained that the cam-cyl inder 169 is actuated inhalf revolutions with a uniform period of rest between each actuation. Ishould now explain that the tape-shifting cam 166, the feed-rollpressurecam 167, and the reversing-cam 168, all X forming a partof'the'cam-cylinder 169, perform their functions in the order namedwithin the first half of each half revolution of the cam. In'other'words, the functions of the three cams are performed withinaquarter revolution of the cam-cylinder 169. During the second half ofeach half revolution, the wire traverse-rod 149 having had itsendwisemovement reversed through the spring-finger 156, breaks the circuit anddemagnetizes the coupling-magnet. 165 when the spring 179 (Fig. 6)operates to swing the lever 178 into its normal position shortly beforethe half revolution of the cam-cylinder'169 is completed- Then justbefore the cam cylinder169 completes its half revolution; its. stop-pinv192 rides up over the cam- .surfaceiaoef the lever 178, and drops.

abruptly into the notch 193 of the lever just as the cam completes itshalf revolution when "the spring 179 swings the lever ab-.

ruptly so as toretract the nose 188 of the active bolt 184 fromengagement with the ratchet'189 and so as to snap the detent 193,

as it w'ere, over the stop-pin 192. As stated; at the "outset of thisdescription,'the tape may be wound upon the coils with "a progressivelyincreasing overlap so as to increase the insulation at the points ofelectrical stress, if desired. The mechanism employed for progressivelyincreasing the overlap of-the tape,,may assume a variety of forms, onlyone of which has been selected for illustration As shown in Fig. 8,provision has been made for differentiating theQ-travel of the Ttape-carriage 42 from the travel of: the nut 45. To this end the upperend of the nut 45 is formed with a .horizontally arranged head 220 theedges of which 'arebev'eled as shown in Fig.5, for co-a tionwithdovetail guides 221 bolted to the lower face of the tape-carriage42, whereby the sameis slid v ably connected with-the nut 45, formovement independent thereof in the direction of the traverse screw 46.The upper face of the head 220 ofthe nut is formed with a rack 222engaged by a pinion. 223 located upon the extreme forward end-of a:shaft 224 journaled in the carriage 42 (Fig; 1) and provided at its rearend with a rocking bar 225 'havingtwo arms 226 and 227. The

said arm 226 carries an operating pin 228- entering a segmental cam'slot 229 formed in 1 the upp'er portion of a leaf 230. fastened to arock-shaft 231 journaled in parts of the machine-frame 28; The arm 227carries a pin 232 entering a segmental cam-slot 233 in the upper portionof a leaf 234 also fastened side of a disk 238 rigidly fastened u onthe. right hand end of the hub 175 of t e cam cylinder 169. The leaves230 and234 are arranged adjacent to the. opposite faces of therocking-bar 225, and the pins 228 and 232 are mounted in the arms 226and 227 of the bar 225 so as to project from the opposite faces thereof,as shown in Fig. 5. The function of the cam-groove 237 in the cam- 238is simply to rock the shaft 231 so as to alternately swing the leaves230 and 234 into position for the co -action of their camslots 229 and233 with the pins 228 and 232 mounted in the arms 226 and 227 of therocking-bar 225. hen the leaf 230 is swung into its operating position,as shown in Fig. 5, its cam-slot 229 receives the pin 228, while at thesa'me time the leaf 23a is swung forward into a clearance position inwhich its cam-slot 233 is cleared from the pin 232. On the other hand,when the leaf 230 is swung rearward to disengage its camslot 229 fromthe pin 228, the leaf 234 is swung rearward for the engagement of itscam-slot 233 with the pin The cam slots 229 and 233 are so related inposition that as one gets out of engagement with its pin, the othermoves into engagement with its pin and vice 'versa. The leaves 230 and234: respectively provide for progressively increasing the overlappingof the tape each in one direction of the traverse thereof by'the turningof the pinion 223 upon the rack 228, whereby relative movement of thecarriage 42.with respect to the nut is produced. The leaves 230 and .234are swung into play'by the groove 237 in the disk 238,

preferably just before the action of the device employed for shiftingthe tape from the end-closure to the adjacent end of the coil. It isevident that if the tape-carriage l2were rigidly fastened to the nut 45,the carriage would be moved exactly in accordancewi h the pitch of thetra erse-screw 46. However, by mounting the carriage {l2 so as to haverelative movement with respect to the nut 56' as just above described,it is apparent that it will provide for the uniform progressive increaseof the overlap or a variable overlap. As already stated, I do not limitmyself to any particular mechanism for effecting the progressiveoverlap- Phil? of the tape. D

' aving already described the different phases of the operation of themachine in conjunction with the detailed description thereof, it will besuflicient to briefly state the consecutive operation of the machine inproducing a coil, nor is it essential that the operations about to bedescribed shall be "strictly followed in the use ofthe machine.

The following description, therefore. must be viewed as ,mere'lyillustrative. In the, first place, a paper core is usually applied tothe spindle. erly threaded through the tape-guide of the machine, willhave its free end fastened at one end to the paper core after which themachine will be started and the spindle re volved for beginning one ofthe two endclosures of the coil. In the operation of the machine, thetape will now be gummed and severed, and its coil-end pressedupon therudimentary end-closure, after which the tape willbe shifted inward adistance substantially corresponding to itsfwidth- The free end of thewire is now adjusted upon the wire guide-rolls of the machineandfastened to the paper core in any suitable way, after whichthe machineis started for automatically producing a coil, the operation having beenmanual up to this point. The wire-traverse and the paper-trzwcrse actingin unison, but at different rates, now proceed The tape having beenpropto apply the first layer of tape and wire,

closure at the opposite end of the coil, after which the tape isautomatically gummed and severed and pressed, and the tape shiftedinward for a distance equivalent toits width.- Just about this time thewire completes its traverse and prepares to be reversed. As the wire isreversed, the tape is positivelyv fedso as to be caught under the wire.The traverse of the wire and tape is now in the opposite direction, thetape moving ahead of the wire as before, and reaching the opposite endof the coil in time to make another contribution to the end-closure atthe other end of the coil, and be gummed and severed and pressed downand shifted, all before the It will be understood that as the coil isbuilt up ayer by layer, and so lncreasecl in diameter, the spindle onwhich it is wound is automatically depressed step-by-step for a'distanceapproximately corresponding to the thickness of the layers, so that-thetape and wire will always be fed to the coil at any period of the growththereof, at the same level in the machine. The coil having been built upto the required size, the wire is cut by hand and the completed coilremoved from the spindle, to which another paper core is now applied,after which the spindle is returned to its starting position by thehand-wheel 26, and the operation repeated for the-winding ofanothercoil.

. I claim 1. A machine for producing electrical coils, having aWire-traverse and-fan insulat .ing material traverse differentiated inthe speed of their travel and operatingto alter'-',

nately apply Wire and insulating material one upon the other andhelically with respect to the axis of the coil, the insulatingmaterialtraverse being intermittent in its operation.

2. A machine for producing electric coils having a wire-traverse and aninsulating material traverse difierentiated in the speed of theirtravel, and means for spirally winding the insulating material at theends of its traverse to form solid end-closures.

3; A machine for producing'electric coils havin awire-traverse and aninsulating material traverse differentiated in the speed of theirtravel,and means for severing the insulating material at the ends of itstraverse.

4. A machine for producing electric coils having a Wire-traverse and aninsulating material traver se differentiated in the speed of theirtravel, and means for severing the insulating "material at the ends ofits trav erse. 3 1

5. A machine for producing electric coils having a Wire-traverse and aninsulating materna ltraverse diiferentiated in the speed of theirtravel, and means for severing the I insulating material atv the ends ofits traverse, and positively feeding the supply-end of the insulatingmaterial after the insulat ing material has been severed and shiftedinward from the end-closure to the end of the coil proper. 6. A machinefor producing electric coils having a wire-traverse and an insulatingmaterial traverse difierentiated in the speed for shifting the end ofthe insulating material inward a distance approximately corresponding toits Width to prepare it for the resumption of helical winding.

8. A machine for producing electrical coils having a reversingWire-traverse and a reversing insulating material traversedifferentiated in the rate of their travel, and means for utilizing theinsulating material in the production of spirally Wound endclosures atthe ends of the layers of wire and 14. A machine insulating"materiahdfor applying an adhesive to the insulating material andsevering the same, for shifting the supply-end of the insulatingmaterial inward a distancecorresponding to its widthfland for posit velyfeeding 1t, all during the intermissionspf the'insulating materialtraverse at the ends thereof.

9. A machine having a wire-traverse and an insulating material traversedifferentiated in therate of their travel, the insulating materialtraverse being'additionally difierentiated in its travel toprogressively increase the overlap of the insulating material in eitherdirection.

10. A machine for producing electric coils for producingelectric coil shaving a reversing Wire-traverse and a re versing insulating materialtraverse differentiated in the speed of their travel, and electricallycontrolled means for severing the insulating material during theinterrup tions of its traverse.

11. A machine for producing electric coils having a reversingWire-traverse and a reversing insulating material traversedifi'erentiated in'the speed of their travel, and

electrically operated means for applying an adhesive to the insulatingmaterial and severing the insulating material during the interruptionsof its traverse,

12. A machine jor producing electric coils having a reversingwire-traverse and a reversing insulating'material traverse diferentiated in the speed of their travel, means for utilizing theinsulating material during the interruptions of its traverse in theproduction of spirally wound end-closures at the ends of the layers ofwire and insulating material, and electrically controlled means foradhering the coil-end of the insulating material to the periphery of theind-closures andsevering it therefrom in the interruptions of itstraverse.

13. A machine for producing electric coils having a winding-splndle, areversing wire: traverse and a reversing insulating material traversediiierentiated in the speed of their travel, and electrically controlledmeans for retiring the spindle step-by-step in conformity with thestep-loy-step growth on the spindle. for producing electric coils havinga reversing wire-traverse and an interrupted reversing insulatingmaterial traverse differentiated in the speed of their travel, means forutilizing the insulating material for the production of end-closuresduring the' interruptions of the insulating material traverse, andelectrically operated means for shunting the said means first mentioned,into, and out of operation.

15. A machine for producing electric coils having a reversingwire-traverse and a reversing insulating material traversedifferentiated in the speed of their travel, and

of the coil electrically controlled mechanism for utilizing theinsulating material for the production of end-closures during theinterruptions of the insulating material traverse, and also for gumming,severing, shifting and feeding the insulating material.

16. A machine for producing electric coils having a wire-traverse and aninsulating, material traverse differentiated in the speed of theirtravel, mechanism for utilizing the insulating material in theproduction of spirally wound end-closures at the ends of the spirallayers of Wire and insulating material, and mechanism for reversing thewire and insulating material traverses.

17. A machine for producing electrical coils having a continuous \viretraverse and an interrupted insulatingmaterial traverse differentiatedin the speed of llnnr travel and operating to altcrraitely apply wireand insulating mate :1 one upon the other and helically with respect toill axis of the coil; and an electrical y controlled means -l'orreversing the said traverse and nieans for severing the insulatingmaterial at the ends of its traverse.

18. A machine for producing electrical coils having a reversingwire-traverse and a reversin lirallatin -material traverse ineluding acontinuously driven but reversible traverse-shaft, and a traverse-screwfrictionterial traverse Without interfering with the constant action ofthe Wire-traverse back and forth.

20. A machine for producing electrical coils having a reversingWire-traverse and a frictionally driven reversing insulating'materialtraverse adapted to be stopped at pre determined periods forinterrupting the ap' pli'cation of the insulating material Withoutstopping a continuous application of Wire.

21. A machine for producing electrical coils having a continuous\vire-trinerse and an interrupted insulilting-material traverseoperating to alternately apply the Wire and insulating material one uponthe other and hehcally with respect to the axis of the coil and meansfor severing the insulating material at the ends of its traverse.

A machine for producing electrical coils, having a Wire-traverse and aninsulating material traverse, one of said traverses being intermittentin'its operation.

23. A machine for producing electrical coils, having a Wire-traverse andan insulating material traverse differentiated in the speed of theirtravel and operating to alternately apply wire and insulating material,one of the traverses being intermittent in its operation.

24. A machine for producing electrical coils having a wire-traverse andan insulating material traverse differentiated in the speed of. theirtravel and operating to alter nately apply wire and insulating materialone upon the other, and helically ,With respect to the axis of the coil,one of the traverses being intermittent in its operation.

In testimony whereof, I have signed this specification in the presenceof tWo subscribmg Witnesses.

CHARLES R. UN DERHILL. Witnesses Fnnnnarc C. EARLE, M. P. NicnoLs.

